Itoo X is a framework that creates a virtual App Inventor environment for background execution. It is the framework that powers Itoo. Today I'm announcing to make the framework open-source for general use.
By adding the framework into your extension, you would be able to leverage the power of background execution same as Itoo.
An example:
If you are making an extension for Pedometer sensor, you could make the user created blocks come into action by background execution offered by Itoo X
Github
Itoo X is open source and is published under the GPL V3 License
Adding Itoo X
If you decide to use the Itoo extension with your project, then add it as a compile-time dependency to not cause any class conflicts. Or to make it independent add it as runtime dependency.
You can find the latest release (as .jar) here — Github releases.
Documentation about the framework is also available at my website.
Do not apply any kind of progaurd or class optimization to Itoo X framework.
Disclaimer
Itoo X framework is well tested with the latest App Inventor system and any new "type" of blocks introduced in future may not be instantly supported by the background environment.
Let me know if you have any queries.
Thanks
Kumaraswamy B G